Home / 16,931.60-25,420.20-9,918.80

Finding the Fourth Proportional to 16,931.60, 25,420.20 and 9,918.80

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Solution

The fourth proportional to 16,931.60, 25,420.20 and 9,918.80 is: 14,891.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,931.60 : 25,420.20 = 9,918.80 : x
  2. Step 2: Convert to fraction form
    16,931.60/25,420.20 = 9,918.80/x
  3. Step 3: Cross multiply
    16,931.60x = 25,420.20 × 9,918.80
  4. Step 4: Simplify right side
    16,931.60x = 252,137,879.76
  5. Step 5: Solve for x
    x = 252,137,879.76/16,931.60
  6. Step 6: Final answer
    x = 14,891.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.